OREAS 607b

OREAS 607b was prepared from a blend of gold-copper-silver bearing ores from Evolution Mining’s Mount Carlton Operation in Queensland, Australia and barren rhyodacite rock sourced from a quarry east of Melbourne, Australia. A small amount of copper-gold-silver rich materials sourced from various ores/concentrates were also added to help achieve the desired grades.

The mineralisation assemblage at Mount Carlton consists of pyrite, enargite/tennantite, tetrahedrite, digenite, covellite, sphalerite, galena, alunite, dickite, kaolinite and vuggy silica, hosted in argillic altered rhyodacite containing sulphur-salts.

The certification program includes:

  • Au by fire assay with AAS or ICP finish
  • Au by aqua regia digestion with AAS or ICP finish
  • Full ICP-OES and MS elemental suites by 4-acid digestion
  • Full ICP-OES and MS elemental suites by aqua regia digestion
  • Total S by Infrared combustion furnace
  • Sulphate S by NaCO3 leach of sulphates, precipitation as barium sulphate and gravimetric finish
  • Sulphide S by NaCO3 leach of sulphates, induction furnace/IR

Indicative values for Sulphate Sulphur and Sulphide Sulphur (among others) are also available.

Analyte Certified Value 1SD Expanded Uncertainty Low Expanded Uncertainty High Method
Au, Gold (ppm) 0.696 0.025 0.686 0.707 Pb Fire Assay
Ag, Silver (ppm) 6.11 0.255 5.84 6.38 4-Acid Digestion
Cu, Copper (ppm) 554 19 537 572 4-Acid Digestion
Au, Gold (ppm) 0.680 0.038 0.661 0.698 Aqua Regia Digestion (sample weights 10-50g)
S, Sulphur (wt.%) 0.881 0.023 0.863 0.899 Infrared Combustion
Al, Aluminium (wt.%) 7.18 0.229 6.94 7.42 4-Acid Digestion
As, Arsenic (wt.%) 0.018 0.001 0.017 0.019 4-Acid Digestion
Ba, Barium (ppm) 2633 169 2509 2757 4-Acid Digestion
Be, Beryllium (ppm) 2.74 0.149 2.61 2.87 4-Acid Digestion
Bi, Bismuth (ppm) 12.5 0.94 11.9 13.2 4-Acid Digestion
Ca, Calcium (wt.%) 1.07 0.037 1.03 1.11 4-Acid Digestion
Cd, Cadmium (ppm) 3.30 0.202 3.09 3.50 4-Acid Digestion
Ce, Cerium (ppm) 83 4.0 80 86 4-Acid Digestion
Co, Cobalt (ppm) 2.79 0.117 2.60 2.97 4-Acid Digestion
Cr, Chromium (ppm) 17.0 2.5 15.5 18.5 4-Acid Digestion
Cs, Caesium (ppm) 5.90 0.348 5.64 6.17 4-Acid Digestion
Dy, Dysprosium (ppm) 3.08 0.266 2.86 3.31 4-Acid Digestion
Er, Erbium (ppm) 0.85 0.070 0.75 0.95 4-Acid Digestion
Eu, Europium (ppm) 1.23 0.098 1.09 1.37 4-Acid Digestion
Fe, Iron (wt.%) 2.22 0.081 2.16 2.28 4-Acid Digestion
Ga, Gallium (ppm) 22.3 1.71 20.9 23.7 4-Acid Digestion
Gd, Gadolinium (ppm) 5.22 0.279 4.89 5.55 4-Acid Digestion
Hf, Hafnium (ppm) 5.36 0.323 5.05 5.68 4-Acid Digestion
Ho, Holmium (ppm) 0.40 0.026 0.38 0.43 4-Acid Digestion
In, Indium (ppm) 0.42 0.019 0.40 0.44 4-Acid Digestion
K, Potassium (wt.%) 2.91 0.140 2.81 3.00 4-Acid Digestion
La, Lanthanum (ppm) 41.1 2.61 38.8 43.3 4-Acid Digestion
Li, Lithium (ppm) 30.5 1.83 28.7 32.4 4-Acid Digestion
Lu, Lutetium (ppm) 0.079 0.012 0.059 0.100 4-Acid Digestion
Mg, Magnesium (wt.%) 0.178 0.010 0.171 0.186 4-Acid Digestion
Mn, Manganese (wt.%) 0.026 0.001 0.026 0.027 4-Acid Digestion
Mo, Molybdenum (ppm) 3.43 0.342 3.17 3.69 4-Acid Digestion
Na, Sodium (wt.%) 2.21 0.108 2.13 2.29 4-Acid Digestion
Nb, Niobium (ppm) 16.0 0.87 15.3 16.6 4-Acid Digestion
Nd, Neodymium (ppm) 33.0 3.23 30.4 35.6 4-Acid Digestion
Ni, Nickel (ppm) 5.77 0.79 5.10 6.44 4-Acid Digestion
P, Phosphorus (wt.%) 0.037 0.003 0.035 0.038 4-Acid Digestion
Pb, Lead (ppm) 1733 69 1673 1792 4-Acid Digestion
Pr, Praseodymium (ppm) 9.43 0.493 8.89 9.96 4-Acid Digestion
Rb, Rubidium (ppm) 131 14 121 140 4-Acid Digestion
Re, Rhenium (ppm) < 0.002 IND IND IND 4-Acid Digestion
S, Sulphur (wt.%) 0.892 0.047 0.862 0.922 4-Acid Digestion
Sb, Antimony (ppm) 13.6 0.81 12.8 14.5 4-Acid Digestion
Sc, Scandium (ppm) 3.96 0.44 3.61 4.32 4-Acid Digestion
Se, Selenium (ppm) 3.57 0.64 2.62 4.53 4-Acid Digestion
Sm, Samarium (ppm) 6.44 0.77 5.79 7.10 4-Acid Digestion
Sn, Tin (ppm) 4.01 0.330 3.76 4.25 4-Acid Digestion
Sr, Strontium (ppm) 208 9 199 217 4-Acid Digestion
Ta, Tantalum (ppm) 1.21 0.13 1.10 1.32 4-Acid Digestion
Tb, Terbium (ppm) 0.65 0.054 0.59 0.70 4-Acid Digestion
Te, Tellurium (ppm) 2.41 0.27 2.20 2.61 4-Acid Digestion
Th, Thorium (ppm) 13.7 1.5 12.8 14.7 4-Acid Digestion
Ti, Titanium (wt.%) 0.124 0.006 0.119 0.129 4-Acid Digestion
Tl, Thallium (ppm) 1.09 0.080 1.02 1.17 4-Acid Digestion
Tm, Thulium (ppm) 0.100 0.008 0.086 0.114 4-Acid Digestion
U, Uranium (ppm) 4.74 0.283 4.52 4.96 4-Acid Digestion
V, Vanadium (ppm) 12.0 1.3 11.1 12.9 4-Acid Digestion
W, Tungsten (ppm) 2.60 0.194 2.44 2.76 4-Acid Digestion
Y, Yttrium (ppm) 12.7 0.56 12.0 13.4 4-Acid Digestion
Yb, Ytterbium (ppm) 0.55 0.07 0.47 0.62 4-Acid Digestion
Zn, Zinc (ppm) 694 29 673 714 4-Acid Digestion
Zr, Zirconium (ppm) 196 11 189 204 4-Acid Digestion
Ag, Silver (ppm) 6.10 0.242 5.87 6.33 Aqua Regia Digestion
Al, Aluminium (wt.%) 0.627 0.053 0.596 0.659 Aqua Regia Digestion
As, Arsenic (wt.%) 0.017 0.001 0.016 0.018 Aqua Regia Digestion
B, Boron (ppm) < 10.0 IND IND IND Aqua Regia Digestion
Ba, Barium (ppm) 412 58 380 445 Aqua Regia Digestion
Be, Beryllium (ppm) 0.66 0.07 0.60 0.73 Aqua Regia Digestion
Bi, Bismuth (ppm) 13.4 1.04 12.8 14.0 Aqua Regia Digestion
Ca, Calcium (wt.%) 0.870 0.049 0.843 0.898 Aqua Regia Digestion
Cd, Cadmium (ppm) 3.16 0.178 3.03 3.28 Aqua Regia Digestion
Ce, Cerium (ppm) 41.6 5.7 38.0 45.2 Aqua Regia Digestion
Co, Cobalt (ppm) 2.17 0.153 2.03 2.30 Aqua Regia Digestion
Cr, Chromium (ppm) 14.8 1.25 13.8 15.8 Aqua Regia Digestion
Cs, Caesium (ppm) 1.52 0.20 1.40 1.63 Aqua Regia Digestion
Cu, Copper (ppm) 554 15 539 568 Aqua Regia Digestion
Dy, Dysprosium (ppm) 1.56 0.18 1.36 1.76 Aqua Regia Digestion
Er, Erbium (ppm) 0.41 0.022 0.36 0.46 Aqua Regia Digestion
Eu, Europium (ppm) 0.58 0.08 0.48 0.67 Aqua Regia Digestion
Fe, Iron (wt.%) 1.59 0.077 1.54 1.64 Aqua Regia Digestion
Ga, Gallium (ppm) 3.46 0.55 3.11 3.81 Aqua Regia Digestion
Gd, Gadolinium (ppm) 2.79 0.250 2.47 3.12 Aqua Regia Digestion
Ge, Germanium (ppm) 0.076 0.010 0.058 0.094 Aqua Regia Digestion
Hf, Hafnium (ppm) 1.01 0.073 0.93 1.08 Aqua Regia Digestion
Hg, Mercury (ppm) 0.098 0.016 0.075 0.121 Aqua Regia Digestion
Ho, Holmium (ppm) 0.20 0.02 0.18 0.23 Aqua Regia Digestion
In, Indium (ppm) 0.36 0.018 0.34 0.38 Aqua Regia Digestion
K, Potassium (wt.%) 0.261 0.028 0.245 0.276 Aqua Regia Digestion
La, Lanthanum (ppm) 20.6 2.7 18.8 22.4 Aqua Regia Digestion
Li, Lithium (ppm) 8.34 0.84 7.70 8.99 Aqua Regia Digestion
Lu, Lutetium (ppm) 0.029 0.003 0.022 0.036 Aqua Regia Digestion
Mg, Magnesium (wt.%) 0.084 0.005 0.081 0.086 Aqua Regia Digestion
Mn, Manganese (wt.%) 0.024 0.001 0.023 0.025 Aqua Regia Digestion
Mo, Molybdenum (ppm) 3.06 0.183 2.89 3.24 Aqua Regia Digestion
Na, Sodium (wt.%) 0.060 0.010 0.054 0.067 Aqua Regia Digestion
Nd, Neodymium (ppm) 17.4 2.8 14.4 20.5 Aqua Regia Digestion
Ni, Nickel (ppm) 4.98 0.324 4.58 5.38 Aqua Regia Digestion
P, Phosphorus (wt.%) 0.026 0.001 0.025 0.027 Aqua Regia Digestion
Pb, Lead (ppm) 1681 49 1645 1718 Aqua Regia Digestion
Pr, Praseodymium (ppm) 5.07 1.14 3.91 6.22 Aqua Regia Digestion
Rb, Rubidium (ppm) 13.9 1.7 12.9 14.9 Aqua Regia Digestion
Re, Rhenium (ppm) < 0.001 IND IND IND Aqua Regia Digestion
S, Sulphur (wt.%) 0.491 0.025 0.472 0.511 Aqua Regia Digestion
Sb, Antimony (ppm) 9.79 0.931 9.14 10.45 Aqua Regia Digestion
Sc, Scandium (ppm) 1.09 0.21 0.96 1.21 Aqua Regia Digestion
Se, Selenium (ppm) 3.03 0.232 2.77 3.28 Aqua Regia Digestion
Sm, Samarium (ppm) 3.51 0.57 2.94 4.08 Aqua Regia Digestion
Sn, Tin (ppm) 1.19 0.20 1.05 1.33 Aqua Regia Digestion
Sr, Strontium (ppm) 34.6 1.43 33.6 35.5 Aqua Regia Digestion
Ta, Tantalum (ppm) < 0.010 IND IND IND Aqua Regia Digestion
Tb, Terbium (ppm) 0.34 0.030 0.31 0.37 Aqua Regia Digestion
Te, Tellurium (ppm) 2.35 0.195 2.16 2.54 Aqua Regia Digestion
Th, Thorium (ppm) 6.94 0.456 6.59 7.28 Aqua Regia Digestion
Ti, Titanium (wt.%) 0.011 0.001 0.010 0.012 Aqua Regia Digestion
Tl, Thallium (ppm) 0.41 0.035 0.39 0.44 Aqua Regia Digestion
U, Uranium (ppm) 2.23 0.181 2.12 2.35 Aqua Regia Digestion
V, Vanadium (ppm) 3.49 0.94 2.75 4.23 Aqua Regia Digestion
W, Tungsten (ppm) 0.58 0.09 0.49 0.66 Aqua Regia Digestion
Y, Yttrium (ppm) 5.77 0.361 5.49 6.05 Aqua Regia Digestion
Yb, Ytterbium (ppm) 0.21 0.012 0.20 0.22 Aqua Regia Digestion
Zn, Zinc (ppm) 641 20 624 658 Aqua Regia Digestion
Zr, Zirconium (ppm) 35.3 5.5 32.2 38.4 Aqua Regia Digestion
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